Improvement in miter-machines



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Letters Patent No. 108,296, dated October i1, 1870.

IMPROVEMENT'IN MITER-NIACHINES.

The Schedule referred to in 'these Letters Patent and making part of thesame To all whom 'it may conoci-nf:

Beit known that I, LnANnEn W. Rosacea, of Marshalltownyin the county ofMarshall and in the State of' Iowa, have invented certain new and usefulImprovements in Guide for Hand-Saws and do hereby declare that thefollowing is a `full, clear, and exact description thereof', referencebeing had to the accompanying di'awing and to the letters of referencemarked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangementof a hand-saw guide, intended to guide the 'saw while cutting a board orplank at any one or two angles at the same time, the saw-guide being soarranged that it can be turned either to the right or left, raised upand down, and placed at any angle with the bed desired. v

In order to enable others skilled in the art to which my inventionappertains to 'make and use the same, I will now proceed to describe itsconstruction and operation, referring to lthe annexed drawing, in whichiFigure 1 is a side view, and

Figure 2 is an end view of my machine.

Figure 3 is a plan view of a cylinder-frame used in the machine, and

Figure 4 is a side view ot' a degree-scale, also used with my machine.l

A represents the bed-frame of my machine, at one end ot' which is hingeda cylinder-frame, B. This cylinder is, at its lower end, provided with atenon, a, anda circular shoulder or bearing on either side. At the topit is provided with an indicator-plate, d, which is plainly shown intig. 3.

A. cylinder, G, passes through the -frame B, its lower end beingfastened to the tenen a by means of a pivot-screw, and its upperend'extcndiug a suitable distance above the indicator-plate fl. Thiscylinder may be .rotated 011 its pivot either to the right or left, andheld at any point desired by means of a thumb-screw, E, passing throughthe cylinderframe. v

Through the cylinder C to the bottom thereof runs a rod, D, which isprovided with a longitudinal groove, f, whose sides converge toward itscenter, and receives the frustnm of the thumb-screw g, which passesthrough the cylinder, and keeps it from turning in the cylinder C, andallows it, to be, raised and lowered at will.

At the upper end of the rod D is an arm, E, provided at its outer endwith a cross-head, G, having two bars, 1I H, extending downward parallelwith the rod I), said bars being slotted longitudinally, as shown infig. 1.-

The cylinder C is, immediately above the indicator-plate d, proyidedwith a needle-point or iiner, 1f.

g Ou the side ot' the cylinder-frame B, at its upper end, is attached agraduated or scale-brace, I, which passes through an inclinedprojection, h, on a post or standard, J,'and is there secured by athumbscrewl At the other end of the frame A is another post or standard,M, and under the frame at this end is placed a board7 N, crosswise, asshownin iig. 2.

-The cylinder-frame B and posts J and M are so arranged that a board orplank placed alongside of theframe will touch the side of all three.

K is a degree-scale, the use of which will be presently explained.

rIhe frameA is screwed to a plank, as shown by dotted lines in iig. l,the board N bearing against its edge. Then set the bevel-tool to therequired angle, apply the haft or handle against the base of thedegree-scale K, with its blade across the face. Loosen the thumb-screwE, turn the cylinder O, with the necdle-pointi, at the correspondingpoint indicated by the bevel-tool on the degree-scale, then tighten thescrew' E again. Proceed in the same manner with the scale-brace I il'1 adiagonal cut is wanted; that is, loosen the thumb-screw in theprojection lt, move the brace with the cylinder down to the left to therequired point, and then tighten the screw.

Then take the timber; place its edge on the plank to which the frame Ais secured, with the edges ot' the timber against the posts J M and thecylinderframe B; then loosen the thumb-screw g, and raise the rod Duntil the lower ends of the guide-bars H H will be about one-half vorthree-fourths 0f an inch above the timber; vthen tighten the screw,insert the back of the saw in the slots in the guide-bars H H, and sawit down.

Having thus fully described my invention,

IVhat I claim as new, and desire 'to secure by Letters Patent, is

1. lhe cylinder-frame .13, provided with the tcnon a and circularshoulders or bearings b l1, said frame being hinged to the bed or frameA, and braced by/ the scale-brace I, substantially as andy fonthepurposes herein set forth.

2. 'lhe combination of the hingedcylinder-frame B with indicator-platedfpivoted cylinder G, with needle-point t, longitudinally-grooved rod D,having the slotted guide-bars H' H attached to its upper end, allsubstantially as and for the purposes herein set forth.

3. The frame or bed A, provided with posts J M and board N,substantially as and for therrpurposes In testimony that I claim theforegoing, I have herein set forth.

4. The combination of the bed A, cylinder-frame 1870.

1S, cylinder O, rod D, guide-bars H H, scale-brace 4 LEANDER, \V.ROSECRANS. 1posts J M, :md board N, all constructed and ar- Witnesses:

ranged to operate substantially in the-mzmnner and WM..H. SUMMEBS,

for the purposes herein set fort-h. T. W. HART.

hereunto set my hand this 8th davy of March,

